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I amended my post to include the usual safety margin for human loads: 10-15 to 1.
Pick a midpoint of 12.5 and divide 1600 by it:

128lb

.

As though Shug pulled it from a hat.

'cause Shug is a power-of-two kind of guy!

The most recent roll of Amsteel I bought was 1/8" (by the 12.5:1 rule, 200 lbs). I'm still working off, using, and giving to others the last bits of my 7/64", meaning that for all practical purposes, I'm acting as though I believe 7/64" is safe enough for me. That said, the multiplier effect (1/8" is a little over 1.5 times heavier and 1.5 times stronger than 7/64") doesn't apply to diameter (it's only 14% larger that way) and so the increase in packing bulk between the two is not as great. This is one of those places in the tradeoff space where the gain in safety is so great relative to increase in weight that it makes sense to me.

I should also add that I've had a Vectran line rated to 2000 lbs (if memory serves) snap. It was a structural ridgeline, under a lot of tension, there was a knot and I suppose I dropped into the hammock rather than ease into it.

so these safety margins and knots verus splicing do matter in hammocking, a point that Demostix repeats, and I here echo.

The most recent roll of Amsteel I bought was 1/8" (by the 12.5:1 rule, 200 lbs). I'm still working off, using, and giving to others the last bits of my 7/64", meaning that for all practical purposes, I'm acting as though I believe 7/64" is safe enough for me. That said, the multiplier effect (1/8" is a little over 1.5 times heavier and 1.5 times stronger than 7/64") doesn't apply to diameter (it's only 14% larger that way) and so the increase in packing bulk between the two is not as great. This is one of those places in the tradeoff space where the gain in safety is so great relative to increase in weight that it makes sense to me.

I should also add that I've had a Vectran line rated to 2000 lbs (if memory serves) snap. It was a structural ridgeline, under a lot of tension, there was a knot and I suppose I dropped into the hammock rather than ease into it.

so these safety margins and knots verus splicing do matter in hammocking, a point that Demostix repeats, and I here echo.

and I ease into hammocks now!

You make a good argument for 1/8" Grizz. Matter of fact my first whoopies were made from 1/8" before I got sucked into 7/64" craze. I believe 7/64" isn't a bad choice and use it myself. While none of wants our hammock suspension to snap, that event isn't in the same league as a repel line failing, but why take the chance when so much extra security can be had for such a small penalty. Teach me to try and hang with the cool kids.

Of course most of Dutch's little titanium gizmos won't work with 1/8".

Of course most of Dutch's little titanium gizmos won't work with 1/8".

If you ask, he may be able too. A while back, last year I think, I needed a tarp fly for 2.2mm instead of the standard 1.75mm. He said it was no problem, and made them. He may be able to make his stuff for 1/8".